| 摘要 |
PURPOSE:To eliminate the influence by the environment, and also, to facilitate the extraction of a feature by operating a difference between an original image, and a processed image which has executed a space filter processing to the original image, and deriving a variable density image. CONSTITUTION:By a camera 2, a three-dimensional image is inputted, and by an image processor 3 consisting of an image memory 7 and an image processing processor 8, an average value of total three picture elements of one object picture element from the left side of an original image and one picture element each of the right and left is derived and processed by a using a spatial filter 20 of, for instance, 3X3, and a smoothed image is obtained. Subsequently, the smoothed image and the original image are brought to an inter-image operating, and from an obtained gradation image, a feature is extracted. In such a way, by a spatial filter of an arbitrary shape, an arbitrary smoothed image is obtained by a repeated processing of a spatial filter of a small area, and by deriving a difference to the original image, a two-dimensional floating binarization is realized, and the feature can be extracted without being influenced by the environment. |
